Yamaha BEARTRACKER YFM250XC, Service Manual

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ENG
ENGINE ASSEMBLY AND ADJUSTMENT
5.Install:
●
Cylinder 1
●
Bolts (cylinder)-temporary tighten
NOTE:
●
Install the cylinder with one hand while
compressing the piston rings with the
other hand.
●
Pass the timing chain through the chain
cavity.
6.Install:
●
Chain guide 1 (exhaust)
●
Oil seal 2
●
Dowel pins 3
●
Gasket 4 (cylinder head)
WARNING
Always use a new gasket.
7.Install:
●
Cylinder head assembly
●
Bolts (cylinder head)
NOTE:
●
Apply the 4-stroke engine oil onto the
washers.
●
Tighten the bolts starting with the lowest
numbered one.
●
The embossed numbers in the cylinder
head designate the tightening sequence.
8.Tighten:
●
Bolts 1 ~ 4 (cylinder head)
●
Bolts 5 , 6 (cylinder head and cylinder)
●
Bolts (cylinder)
T
R
.
.
Bolt (cylinder head):
22 Nm (2,2 m • kg, 16 ft • lb)
Bolt (cylinder head and cylinder):
22 Nm (2.2 m • kg, 16 ft • lb)
Bolt (cylinder):
10 Nm (1.0 m • kg, 7.2 ft • lb)
9.Install:
●
Cam sprocket
*********************************
Cam sprocket installing steps:
●
Rotate the camshaft to align the camshaft
pin
1 with the cylinder head match mark
2 .
4